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  • 1
    Electronic Resource
    Electronic Resource
    Canonical correlation technique for rank estimation of excitation-emission matrixes (1989)
    s.l. : American Chemical Society
    Analytical chemistry 61 (1989), S. 2219-2224 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00194a020
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of oxidizable inorganic anions by reversed-phase ion-pair chromatography with amperometric detection
    Amsterdam : Elsevier
    Analytica Chimica Acta 276 (1993), S. 261-264 
    Details
    ISSN: 0003-2670
    Keywords: Amperometry ; Inorganic anions ; Ion chromatography ; Waters
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(93)80392-X
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  • 3
    Electronic Resource
    Electronic Resource
    Solvothermal Synthesis and Processing of Yttria-Stabilized Zirconia Nanopowder (2005)
    Oxford, UK : Blackwell Science Inc
    Journal of the American Ceramic Society 88 (2005), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A solvothermal method has been used to produce nanoparticles of cubic/tetragonal yttria-stabilized zirconia (YSZ) with uniform particle size, homogenous composition, and high crystallinity. The effects of reaction time, reactant concentration, processing temperature, and solvent composition on prime particle size and YSZ phase proportion have been investigated. The effect of solvent, a mixture of ethanol/2-propanol, on crystallite size and agglomerate size was studied and discussed according to Derjaguin-Landau-Verwey-Overbeek (DLVO) theory and surface chemistry. The prime particle diameter was 2–4 nm and secondary particle size was 140–180 nm. After compaction and sintering at 1000°C, YSZ with a grain size of approximately 50 nm in diameter was obtained with a typical relative density of 94%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00161.x
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  • 4
    Electronic Resource
    Electronic Resource
    Calculation of photoelectron spectra of the trihalides of group v elements
    Amsterdam : Elsevier
    Journal of Electron Spectroscopy and Related Phenomena 33 (1984), S. 93-105 
    Details
    ISSN: 0368-2048
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0368-2048(84)80012-2
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  • 5
    Electronic Resource
    Electronic Resource
    The wavelength component vectorgram: A tool for resolving two-component fluorescent mixtures (1989)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 3 (1989), S. 431-441 
    Details
    ISSN: 0886-9383
    Keywords: Resolution of mixtures ; Excitation-emission matrices ; Eigenanalysis ; Wavelength component vectorgram ; Total luminescence spectroscopy ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We consider the problem of resolving the total luminescence spectra of two-component mixtures. Non-negativity of the constituent spectra is commonly used as a criterion to accomplish this resolution, but its application seldom leads to unique answers. Sometimes, the condition must be relaxed because no solution satisfying non-negativity exists. In these cases judgments must be made concerning which parts of the spectra will be allowed to go negative and by how much.The wavelength component vectorgramn (WCV) is presented here as a tool for assisting the experimenter in making these judgments. Even when non-negative resolutions exist, it may happen that resolutions with slight negative elements will more closely match the spectra of the pure constituents. The WCV can also be used as a tool for detecting these cases. The methodology is illustrated with real data from a two-component mixture.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180030210
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  • 6
    Electronic Resource
    Electronic Resource
    A bootstrap resampling scheme for using the canonical correlation technique in rank estimation (1991)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 5 (1991), S. 333-343 
    Details
    ISSN: 0886-9383
    Keywords: Rank estimation ; Bootstrap resampling ; Canonical correlation ; Excitation-emission matrix ; Singular value decomposition ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Rank estimation by canonical correlation analysis in multivariate statistics has been proposed as an alternative approach for estimating the number of components in a multicomponent mixture. A methodological turning point of this new approach is that it focuses on the difference in structure rather than in magnitude in characterizing the difference between the signal and the noise. This structural difference is quantified through the analysis of canonical correlation, which is a well-established data reduction technique in multivariate statistics. Unfortunately, there is a price to be paid for having this structural difference: at least two replicate data matrices are needed to carry out the analysis.In this paper we continue to explore the potential and to extend the scope of the canonical correlation technique. In particular, we propose a bootstrap resampling method which makes it possible to perform the canonical correlation analysis on a single data matrix. Since a robust estimator is introduced to make inference about the rank, the procedure may be applied to a wide range of data without any restriction on the noise distribution. Results from real as well as simulated mixture samples indicate that when used in conjunction with this resampling method, canonical correlation analysis of a single data matrix is equally efficient as of replicate data matrices.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180050403
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  • 7
    Electronic Resource
    Electronic Resource
    Resolution of multicomponent fluorescent mixtures by analysis of the excitation-emission-frequency array (1990)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 4 (1990), S. 15-28 
    Details
    ISSN: 0886-9383
    Keywords: Resolution of total luminescence spectra ; Phase-resolved fluorescence spectroscopy ; Generalized rank annihilation method ; Excitation-emission-frequency array ; Simultaneous diagonal decomposition ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fluorescence lifetime provides a third independent dimension of information for the resolution of total luminescence spectra of multicomponent mixtures. The incorporation of this parameter into the excitation-emission matrix (EEM) by the phase modulation technique results in a three-dimensional excitation-emission-frequency array (EEFA). Multicomponent analysis based on the three-dimensional EEFA brings a qualitative change for the resolved spectra, i.e. individual spectra can be uniquely resolved, which is impossible with any two-dimensional analysis. In this paper we present a method for analyzing the EEFA. We show mathematically that with the three-dimensional analysis of the EEFA individual spectra and lifetimes can be obtained. Our algorithm is developed in mathematical detail and is demonstrated by its application to a two-component mixture.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180040104
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  • 8
    Electronic Resource
    Electronic Resource
    A three-way array model for resolving multicomponent fluorescent mixtures (1992)
    Springer
    Acta mathematicae applicatae sinica 8 (1992), S. 6-17 
    Details
    ISSN: 1618-3932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Fluorescence lifetime provides a third independent dimension of information for the resolution of total luminescence spectra of multicomponent mixtures. The incorporation of this parameter into the Excitation-Emission Matrix (EEM) by the phase-modulation technique results in a three-dimensional Excitation-Emission-Frequency Array (EEFA). Multicomponent analysis based on the three-dimensional EEFA brings a qualitative change for the resolved spectra, i.e., individual spectra can be uniquely resolved, which is impossible with any two-dimensional analysis. In this paper, we present a method for analyzing the EEFA. We show mathematically that with the three-dimensional analysis of the EEFA individual spectra and lifetimes can be obtained. Our algorithm is developed in mathematical detail and demonstrated by its application to a two-component mixture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02006069
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  • 9
    Electronic Resource
    Electronic Resource
    Study of photoelectron spectra of some XPY3 molecules (X = O, S and Y = Cl, Br) by the SCF-Xα-SW method (1986)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 29 (1986), S. 393-397 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In this paper we extend our previous studies to investigate the ionization energies of some XPY3 molecules (X = O, S and Y = Cl, Br). The calculated orbital energies agree very well with reported experimental ionization energies. The molecular orbital orderings obtained coincide with recent experimental orbital assignments. The results are also compared with previous ab initio and semiempirical calculations for OPCl3, OPBr3, SPCl3, and SPBr3 molecules. The comparison indicates that the present results show improved agreement with experiment and clarify certain ambiguities in the earlier assignments.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560290313
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  • 10
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    Improved calibration method for refraction errors in multibeam bathymetries with a wider range of water depths (2021)
    In:  Applied Ocean Research
    Details
    Publication Date: 2021-10-20
    Description: Errors induced by inaccurate or insufficient sound speed profiles (SSPs) in the water column will cause refraction errors in multibeam bathymetries. Most existing methods focus on eliminating errors in shallow water. Thus, to address the problems in a wider range of water depths, a new method is developed. First, beams in each ping are divided into two parts with the nadir beam as a boundary, and beams in each part have one equivalent sound speed profile (ESSP). Then, the overlaps of adjacent swaths are used to estimate the gradients of ESSPs by minimizing the depth difference in the overlaps with the differential evolution (DE) algorithm. To verify the proposed method, two datasets, i.e., one with artificially introduced refraction errors from water depths within 24 m and the other with refraction errors from water depths within 300 m, are calibrated. The results show that the mean and standard deviation (SD) of the depth difference between the results of the proposed method and the in situ measurements in the shallow water data are approximately -0.006 m and 0.006 m, respectively. The mean and SD of the depth difference between the results of the proposed method and the in situ measurements in the deeper water data are approximately less than -0.066 m and 0.266 m, respectively.
    Type: info:eu-repo/semantics/article
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